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WO2018168670A1 - Terminal utilisateur et procédé de positionnement - Google Patents

Terminal utilisateur et procédé de positionnement Download PDF

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Publication number
WO2018168670A1
WO2018168670A1 PCT/JP2018/009129 JP2018009129W WO2018168670A1 WO 2018168670 A1 WO2018168670 A1 WO 2018168670A1 JP 2018009129 W JP2018009129 W JP 2018009129W WO 2018168670 A1 WO2018168670 A1 WO 2018168670A1
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WO
WIPO (PCT)
Prior art keywords
positioning
terminal
base station
unit
transmission
Prior art date
Application number
PCT/JP2018/009129
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English (en)
Japanese (ja)
Inventor
匡史 岩渕
アナス ベンジャブール
祥久 岸山
Original Assignee
株式会社Ｎｔｔドコモ
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Filing date
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Publication of WO2018168670A1 publication Critical patent/WO2018168670A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to a user terminal and a positioning method.
  • LTE Long Term Evolution
  • FRA Full Radio Access
  • 5G Fifth Generation mobile mobile communication system
  • 5G + 5G plus
  • New-RAT Radio Access Technology
  • a large number of antenna elements for example, 100 elements or more are used in a high frequency band (for example, 5 GHz or more) in order to further increase the speed of signal transmission and reduce interference. It has been studied to perform BF (beam forming) using a massive MIMO (Multiple Input Input Multiple Output) technique.
  • BF beam forming
  • MIMO Multiple Input Input Multiple Output
  • a beam formed by Massive MIMO technology is directed in the direction in which the reception quality at the user terminal (hereinafter simply referred to as “terminal”) is highest.
  • GNSS Global Navigation Satellite System
  • GLONASS Global Navigation Satellite System
  • Galileo a method using a positioning signal from a GNSS (Global Navigation Satellite System) satellite (not shown) is known (for example, see Patent Document 1).
  • GNSS Global Navigation Satellite System
  • GPS Global Positioning System
  • GLONASS Global Navigation Satellite System
  • Galileo Galileo
  • terminal reception quality When the terminal is within the line-of-sight of the base station (LOS (Line Of Site)), the reception quality at the terminal (hereinafter referred to as “terminal reception quality”) is highest by directing the beam in the direction in which the terminal exists.
  • the beam formed by Massive MIMO technology is directed in the direction in which the terminal exists. Therefore, it is possible to estimate the direction in which the terminal exists in the beam control process of the Massive MIMO technique. Furthermore, since the narrower beam can be formed using a large number of antenna elements as the frequency becomes higher, the estimation accuracy is improved. Therefore, the affinity between MassiveMa MIMO technology and terminal positioning is considered high.
  • the positioning is determined based on the position coordinates of each base station and the AOD (Angle Of Departure) corresponding to the beam selected by each base station. Estimation) can be performed with high accuracy. Further, it is possible to perform position estimation using an AOA (Angle Of Arrival) corresponding to the beam used for reception by the base station using the uplink signal from the terminal. In addition, TOA (Time Of Time Arrival), DTOA (Difference Time Of Of Arrival), RSS (Received Signal Signal Strength), and the like are calculated using PRS (Positioning Reference Signal) transmitted from the base station using the selected beam. Thus, positioning of the terminal can be performed with high accuracy.
  • AOA Angle Of Arrival
  • TOA Time Of Time Arrival
  • DTOA Difference Time Of Of Arrival
  • RSS Receiveived Signal Signal Strength
  • the beam in the terminal direction is attenuated by the obstacle, and the terminal reception quality of the beam is deteriorated. May decrease.
  • One embodiment of the present invention provides a new configuration capable of performing positioning using Massive MIMO technology even when an obstacle exists between a base station and a terminal.
  • a user terminal is a user terminal that communicates with a radio base station that performs beam transmission and beam reception, and receives quality measurement that measures a first parameter related to reception quality for each beam candidate. And a positioning accuracy calculation unit that calculates a second parameter related to positioning accuracy, which is different from the first parameter, for each beam candidate.
  • a radio base station transmits a signal to each beam candidate toward a user terminal, and the user terminal sets a first parameter related to reception quality for each beam candidate. Measuring, calculating a second parameter related to positioning accuracy, which is different from the first parameter, and the user terminal or the radio base station selects a beam for data transmission based on the first parameter; A positioning beam is selected based on the parameter, and the user terminal or the radio base station performs a positioning process using a signal transmitted using the positioning beam.
  • a new configuration capable of performing positioning of a terminal using Massive MIMO technology even when an obstacle exists between the base station and the terminal.
  • FIG. 3 is a block diagram illustrating a configuration example of a base station according to Embodiment 1.
  • FIG. 3 is a block diagram illustrating a configuration example of a terminal according to Embodiment 1.
  • FIG. 6 is a sequence diagram showing operations of a base station and a terminal according to Embodiment 1.
  • FIG. It is a figure which shows an example of the propagation path condition between the base station which concerns on Embodiment 1, and a terminal.
  • 3 is a block diagram showing a configuration example of a base station according to Variation 1 of Embodiment 1.
  • FIG. 3 is a block diagram illustrating a configuration example of a terminal according to Variation 1 of Embodiment 1.
  • FIG. 1 is a block diagram illustrating a configuration example of a terminal according to Variation 1 of Embodiment 1.
  • FIG. 6 is a sequence diagram showing operations of a base station and a terminal according to variation 1 of Embodiment 1.
  • FIG. 6 is a sequence diagram illustrating operations of a base station and a terminal according to variation 2 of Embodiment 1.
  • FIG. 6 is a sequence diagram illustrating operations of a base station and a terminal according to variation 3 of the first embodiment.
  • FIG. 6 is a sequence diagram illustrating an operation example of a base station and a terminal according to Embodiment 2.
  • FIG. It is a figure which shows an example of the propagation path condition between the base station which concerns on Embodiment 2, and a terminal.
  • 6 is a block diagram illustrating a configuration example of a base station according to variation 1 of Embodiment 2.
  • FIG. 10 is a block diagram illustrating a configuration example of a terminal according to variation 1 of the second embodiment.
  • FIG. 10 is a sequence diagram showing operations of a base station and a terminal according to variation 1 of the second embodiment.
  • FIG. 10 is a block diagram illustrating a configuration example of a terminal according to Embodiment 3.
  • FIG. 10 is a sequence diagram showing operations of a base station and a terminal according to Embodiment 3.
  • FIG. 10 is a diagram illustrating an example of a propagation path condition between a base station and a terminal according to Embodiment 3.
  • FIG. 11 is a sequence diagram illustrating operations of a base station and a terminal according to variation 1 of the third embodiment.
  • FIG. 11 is a sequence diagram showing operations of a base station and a terminal according to variation 2 of the third embodiment. It is a figure which shows an example of the hardware constitutions of the base station and terminal which concern on this invention.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal-Received Quality
  • RSSI Received Signal Strength-Indicator
  • path loss path loss
  • SINR Signal-to-Interference plus Noise Ratio
  • the radio communication system includes at least base station 10 shown in FIG. 1 and terminal 20 shown in FIG.
  • the terminal 20 is connected to the base station 10.
  • the base station 10 transmits a DL (Down Link) signal to the terminal 20.
  • the DL signal includes, for example, a DL data signal (eg, PDSCH (Physical Downlink Shared Channel)) and a DL control signal (eg, PDCCH (Physical Downlink Control Channel)) for demodulating and decoding the DL data signal. It is.
  • a DL data signal eg, PDSCH (Physical Downlink Shared Channel)
  • a DL control signal eg, PDCCH (Physical Downlink Control Channel)
  • Embodiment 1 describes a case where the base station 10 performs BF and the terminal 20 selects a transmission beam used for data transmission and a positioning beam used for positioning.
  • FIG. 1 is a diagram illustrating a configuration example of a base station 10 according to the present embodiment.
  • 1 includes a discovery signal generation unit 101, a PRS generation unit 102, a data signal generation unit 103, a precoding unit 104, a weight selection unit 105, a transmission beamforming unit 106, and a communication unit.
  • 107, an antenna 108, a reception beam forming unit 151, a feedback signal processing unit 152, a post coding unit 153, and a data signal processing unit 154 are employed.
  • a configuration unit for transmitting / receiving an OFDM (Orthogonal Frequency Division Multiplexing) signal in the base station 10 for example, an IFFT (Inverse Fast Fourier Transform) processing unit, a CP (Cyclic Prefix) addition unit, a CP removal unit) , FFT (Fast Fourier Transform) processing unit) and the like are omitted.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the discovery signal generation unit 101 generates the same number of discovery signals as the number M of candidate BF weights (M is an integer of 2 or more).
  • the discovery signal is a reference signal used to determine a beam (BF weight).
  • Discovery signal generation section 101 outputs the generated discovery signal to transmission beamforming section 106.
  • the PRS generation unit 102 generates the same number of PRSs as the number M of BF weight candidates.
  • PRS is a reference signal used for positioning.
  • the PRS generation unit 102 outputs the generated PRS to the transmission beamforming unit 106.
  • the data signal generation unit 103 performs encoding processing and modulation processing on data of K streams (K is an integer equal to or less than M) for the terminal 20, and generates a data signal (downlink signal).
  • the data signal generation unit 103 outputs the generated data signal to the precoding unit 104.
  • FIG. 1 only the data signal generation unit 103 for one terminal 20 (i-th terminal 20) is shown, but the base station 10 has a data signal generation unit 103 for each of the plurality of terminals 20. Shall.
  • the precoding unit 104 multiplies the K data signals output from the data signal generation unit 103 by a precoding matrix for each subcarrier to generate M data signals after precoding. Precoding section 104 outputs the generated M data signals to transmission beamforming section 106.
  • the weight selection unit 105 selects a BF weight that forms the transmission beam selected by the terminal 20 based on the transmission beam information output from the feedback signal processing unit 152, and transmits the transmission beam forming unit 106 and the reception beam forming unit. 151 is output.
  • the transmission beamforming unit 106 multiplies the discovery signal output from the discovery signal generation unit 101 by a BF weight candidate before starting data transmission. Transmit beamforming section 106 outputs a discovery signal after multiplication by BF weight candidates to communication section 107.
  • the transmission beamforming unit 106 multiplies the PRS output from the PRS generation unit 102 by a BF weight candidate after the discovery signal is transmitted and before the data transmission is started. Transmit beamforming section 106 outputs to PRS 107 the PRS after multiplying by the BF weight candidate.
  • the transmission beamforming unit 106 multiplies the data signal output from the precoding unit 104 by the BF weight output from the weight selection unit 105 during data transmission. Transmit beamforming section 106 outputs the data signal after being multiplied by the BF weight to communication section 107.
  • Communication units 107-1 to 107-M are provided corresponding to M antennas 108 (antenna elements), respectively.
  • Each communication unit 107 performs transmission processing such as D / A conversion and up-conversion on the signal output from the transmission beamforming unit 106 to generate a radio frequency transmission signal.
  • Each communication unit 107 transmits the generated radio frequency transmission signal from each of the M antennas 108 to the terminal 20.
  • M beam candidates are formed by transmitting a signal obtained by multiplying each of the BF weight candidates from the M antennas 108 (see FIG. 4).
  • each communication unit 107 performs reception processing such as down-conversion and A / D conversion on the signal transmitted from the terminal 20 and received by each of the M antennas 108.
  • Each communication unit 107 outputs a data signal and a feedback signal obtained by performing reception processing to the reception beamforming unit 151.
  • the reception beamforming unit 151 multiplies the feedback signal output from each communication unit 107 by a BF weight candidate before starting data reception.
  • Reception beamforming section 151 outputs a feedback signal after multiplication by BF weight candidates to feedback signal processing section 152.
  • reception beamforming unit 151 multiplies the data signal output from each communication unit 107 by the BF weight output from the weight selection unit 105 at the time of data reception.
  • Reception beamforming section 151 outputs the data signal after being multiplied by the BF weight to postcoding section 153.
  • the feedback signal processing unit 152 performs demodulation processing and decoding processing on the feedback signal output from the reception beam forming unit 151, and extracts transmission beam information indicating the index of the transmission beam selected by the terminal 20.
  • the feedback signal processing unit 152 outputs the extracted transmission beam information to the weight selection unit 105.
  • the post-coding unit 153 performs post-coding on the data signal output from the reception beamforming unit 151 using the post-coding matrix.
  • the post coding unit 153 outputs the post-coded data signal to the data signal processing unit 154.
  • the data signal processing unit 154 performs demodulation processing and decoding processing on the data signal output from the post-coding unit 153, and obtains K streams of data from the i-th terminal 20.
  • FIG. 2 is a block diagram illustrating a configuration example of the terminal 20 according to the first embodiment.
  • the terminal 20 shown in FIG. 2 includes an antenna 201, a communication unit 202, a reception quality measurement unit 203, a positioning accuracy calculation unit 204, a beam selection unit 205, a positioning unit 206, a post coding unit 207, and a data signal.
  • a configuration including a processing unit 208, a feedback signal generation unit 251, a data signal generation unit 252, and a precoding unit 253 is employed.
  • FIG. 2 shows the configuration of the i-th terminal 20 as an example.
  • description of components for example, IFFT processing unit, CP adding unit, CP removing unit, FFT processing unit for transmitting / receiving the OFDM signal in the terminal 20 is omitted.
  • Communication units 202-1 to 202-N are provided corresponding to N antennas 201 (N is an integer of 2 or more), respectively.
  • Each communication unit 202 performs reception processing such as down-conversion and A / D conversion on the reception signal received via the antenna 201.
  • Each communication unit 202 outputs the discovery signal obtained by performing the reception process to the reception quality measurement unit 203 and the positioning accuracy calculation unit 204, and outputs the PRS obtained by performing the reception process to the positioning unit 206, The signal is output to the post coding unit 207.
  • each communication unit 202 performs transmission processing such as D / A conversion and up-conversion on the feedback signal output from the feedback signal generation unit 251 or the data signal output from the precoding unit 253 to perform radio frequency transmission.
  • the transmission signal is generated.
  • Each communication unit 202 transmits the generated radio frequency transmission signal from each of the N antennas 201 to the base station 10.
  • the reception quality measurement unit 203 uses the discovery signal output from the communication unit 202 to measure RSRP between the base station 10 and the terminal 20 of each beam candidate. Reception quality measurement section 203 outputs the measured RSRP of each beam candidate to beam selection section 205.
  • the positioning accuracy calculation unit 204 uses the discovery signal output from the communication unit 202 to calculate a parameter related to the positioning accuracy of each beam candidate (hereinafter simply referred to as “positioning accuracy”).
  • the positioning accuracy calculation unit 204 outputs the calculated positioning accuracy of each beam candidate to the beam selection unit 205. A specific method for calculating the positioning accuracy in the positioning accuracy calculation unit 204 will be described later.
  • the beam selection unit 205 selects a transmission beam in the base station 10 from the M beams based on the RSRP from the reception quality measurement unit 203. Specifically, the beam selection unit 205 selects a beam having the highest RSRP as a transmission beam. The beam selection unit 205 outputs transmission beam information indicating the index of the selected transmission beam to the feedback signal generation unit 251.
  • the beam selection unit 205 selects a positioning beam at the base station 10 from the M beams based on the positioning accuracy from the positioning accuracy calculation unit 204. Specifically, the beam selection unit 205 selects a beam having the best positioning accuracy as a positioning beam. The beam selection unit 205 outputs positioning beam information indicating the index of the selected positioning beam to the positioning unit 206.
  • the positioning unit 206 performs positioning (position estimation) of the own device (terminal 20) using the PRS transmitted in the positioning beam of the positioning beam information output from the beam selection unit 205. Specifically, the positioning unit 206 estimates the direction of the terminal 20 with respect to the base station 10 based on the AOD corresponding to the positioning beam. Further, the positioning unit 206 estimates the distance from the base station 10 to the terminal 20 based on the PRS TOA, TDOA, RSSI, and the like.
  • the post-coding unit 207 performs post-coding on the data signal output from the communication unit 202 using the post-coding matrix, and outputs the post-coded data signal to the data signal processing unit 208.
  • the data signal processing unit 208 performs demodulation processing and decoding processing on the data signal output from the post-coding unit 207 to obtain K streams of data for the i-th terminal 20.
  • the feedback signal generation unit 251 performs encoding processing and modulation processing on the transmission beam information output from the beam selection unit 205 to generate a feedback signal.
  • the feedback signal generation unit 251 outputs the generated feedback signal to the communication unit 202.
  • the feedback signal may include position information acquired by the terminal 20 by other means such as a satellite signal.
  • the data signal generation unit 252 performs encoding processing and modulation processing on data of K streams (K is an integer equal to or less than M) for the base station 10 to generate a data signal (uplink signal).
  • the data signal generation unit 252 outputs the generated data signal to the precoding unit 253.
  • the precoding unit 253 multiplies the K data signals output from the data signal generation unit 252 by a precoding matrix for each subcarrier to generate M data signals after precoding.
  • the precoding unit 253 outputs the generated M data signals to the communication unit 202.
  • the base station 10 switches beam candidates #i (i is an index value and any integer from 1 to M) at a constant transmission interval ⁇ ref from # 1 to #M. To do. Further, it is assumed that the transmission interval ⁇ ref is known in the terminal 20.
  • Positioning accuracy computing section 204 first uses a discovery signal output from the communication unit 202, measures the reception time t i of each beam candidate #i.
  • the arrival time difference T of the beam candidate #i with reference to the beam candidate # 1 by the following equation (1) from the reception time t 1 of the beam candidate # 1 , the reception time t i of the beam candidate #i, and the transmission interval ⁇ ref. i is calculated.
  • the arrival time is the time from the signal transmission time of the base station 10 to the signal reception time of the terminal 20.
  • T i (t i ⁇ t 1 ) ⁇ (i ⁇ 1) ⁇ ⁇ ref (1)
  • the arrival time difference T i of the beam candidate #i is set as the positioning accuracy. That is, as the arrival time difference T i is short, the positioning accuracy is improved.
  • FIG. 3 is a sequence diagram showing operations of base station 10 and terminal 20 according to the present embodiment.
  • FIG. 4 is a figure which shows an example of the propagation path condition between the base station 10 and the terminal 20 which concerns on this Embodiment.
  • the base station 10 transmits a discovery signal to the terminal 20 (ST101).
  • Each discovery signal is multiplied by a BF weight candidate.
  • the discovery signal transmitted for each beam candidate (BF weight candidate) is not precoded and transmitted to all antennas 201 of all terminals 20.
  • terminal 20 uses the discovery signal to measure RSRP and positioning accuracy corresponding to each beam candidate, and selects a transmission beam and a positioning beam (ST102, ST103).
  • the terminal 20 since the RSRP of the discovery signal transmitted in the beam # 2 is the highest, the terminal 20 selects the beam # 2 as a transmission beam. Further, since the positioning signal transmitted with the beam #m has the best positioning accuracy, the terminal 20 selects the beam #m as the positioning beam. As a result, the beam #m directed in the direction in which the terminal 20 exists is used for positioning.
  • the base station 10 transmits a PRS to the terminal 20 (ST104).
  • Each PRS is multiplied by a BF weight candidate.
  • the PRS transmitted for each BF weight candidate is not precoded and transmitted to all antennas 201 of all terminals 20.
  • terminal 20 performs positioning (position estimation of terminal 20) using the PRS transmitted in the positioning beam (#m) (ST105).
  • the transmission beam and the positioning beam are selected using the discovery signal transmitted by each beam candidate.
  • PRS is also transmitted by each beam candidate. Therefore, the transmission beam may be selected using the discovery signal, and the positioning beam may be selected using the PRS.
  • the beam having the highest reception quality is selected as the transmission beam, and the beam having the best positioning accuracy is selected as the positioning beam.
  • the terminal 20 performs positioning processing using a signal transmitted from the base station 10 in a beam directed in the direction in which the terminal 20 exists. Therefore, positioning using Massive MIMO technology can be performed with high accuracy.
  • the beam selection unit 205 selects a positioning beam based only on the calculation result of the positioning accuracy calculation unit 204 has been described.
  • the present embodiment is not limited to this, and the positioning accuracy calculation is performed.
  • the positioning beam may be selected by referring to the positioning beam selected in the past together with the calculation result of the unit 204.
  • the beam selection unit 205 sets an allowable value of the beam index difference, and the difference between the index of the positioning beam selected last time and the index of the beam candidate with the highest positioning accuracy is greater than the allowable value.
  • the previously selected beam may be selected again as a positioning beam.
  • the allowable value is “4”
  • the index of the positioning beam selected last time is “# 1”
  • the index of the beam candidate having the highest positioning accuracy this time is “# 5”
  • the beam selection unit 205 selects beam # 1 without selecting beam # 5 as a positioning beam.
  • a positioning beam can be selected with high accuracy without being affected by a temporary change in the propagation path state between the base station 10 and the terminal 20.
  • the user can arbitrarily determine the allowable value.
  • the allowable value may be set to a smaller value as the beam width is wider. Thereby, it is possible to cope with a change in the beam index due to the movement of the terminal 20. Further, the allowable value may be set to a smaller value as the arrival time is shorter.
  • the beam selection unit 205 may refer to the probability distribution of the beam index within a certain period and select the beam having the highest selection probability as the positioning beam.
  • a positioning beam may be selected by combining the above methods. Furthermore, a measurement result of received power (reception quality) may be combined with the above method.
  • FIG. 5 is a diagram illustrating a configuration example of the base station 10 according to Variation 1 of the present embodiment.
  • the base station 10 shown in FIG. 5 employs a configuration in which a positioning unit 155 is added to the base station 10 shown in FIG.
  • the feedback signal processing unit 152 performs demodulation processing and decoding processing on the feedback signal output from the reception beam forming unit 151, transmission beam information indicating the index of the transmission beam selected in the terminal 20, and the terminal 20 Positioning beam information indicating the index of the positioning beam selected in is extracted.
  • the feedback signal processing unit 152 outputs the extracted transmission beam information to the weight selection unit 105, and outputs the extracted positioning beam information to the positioning unit 155.
  • the positioning unit 155 estimates the direction of the terminal 20 based on the AOD corresponding to the positioning beam of the positioning beam information output from the feedback signal processing unit 152.
  • each of the plurality of base stations 10 estimates the direction of the terminal 20 from the AOD corresponding to the positioning beam. Thereby, the positioning of the terminal 20 can be performed with high accuracy.
  • FIG. 6 is a block diagram illustrating a configuration example of the terminal 20 according to Variation 1 of the present embodiment.
  • the same components as those in FIG. 2 are denoted by the same reference numerals as those in FIG.
  • the terminal 20 shown in FIG. 6 employs a configuration in which the positioning unit 206 is deleted from the terminal 20 shown in FIG.
  • the beam selection unit 205 outputs the transmission beam information and the positioning beam information to the feedback signal generation unit 251.
  • the feedback signal generation unit 251 performs encoding processing and modulation processing on the transmission beam information and positioning beam information output from the beam selection unit 205, and generates a feedback signal.
  • the feedback signal generation unit 251 outputs the generated feedback signal to the communication unit 202.
  • FIG. 7 is a sequence diagram showing operations of base station 10 and terminal 20 according to variation 1 of the present embodiment.
  • the steps common to those in FIG. 3 are denoted by the same reference numerals as those in FIG.
  • the terminal 20 After selecting the transmission beam and the positioning beam (ST102, ST103), the terminal 20 transmits a feedback signal including the transmission beam information and the positioning beam information to the base station 10 (ST111).
  • the base station 10 performs positioning (position estimation) of the terminal 20 using the signal transmitted by the positioning beam (#m) (ST112).
  • the beam having the highest reception quality is selected as the transmission beam, and the beam having the best positioning accuracy is selected as the positioning beam.
  • the base station 10 performs a positioning process using a signal received by a beam directed in the direction in which the terminal 20 exists. Therefore, positioning using Massive MIMO technology can be performed with high accuracy.
  • a configuration example of the base station 10 according to Variation 2 of the present embodiment is the same as FIG. However, in variation 2, the functions of the PRS generation unit 102 and the feedback signal processing unit 152 are changed, and the functions of the weight selection unit 105 and the transmission beamforming unit 106 are added as described below.
  • the PRS generation unit 102 generates one PRS and outputs it to the transmission beamforming unit 106.
  • the weight selection unit 105 is a BF weight that forms the positioning beam selected by the terminal 20 based on the positioning beam information output from the feedback signal processing unit 152 after the discovery signal is transmitted and before the data transmission is started. Is output to the transmission beamforming unit 106.
  • the transmission beamforming unit 106 multiplies the PRS output from the PRS generation unit 102 by the BF weight corresponding to the positioning beam after transmitting the discovery signal and before starting data transmission, and Output.
  • the feedback signal processing unit 152 performs demodulation processing and decoding processing on the feedback signal output from the reception beam forming unit 151, and extracts transmission beam information and positioning beam information.
  • the feedback signal processing unit 152 outputs the extracted transmission beam information and positioning beam information to the weight selection unit 105.
  • ⁇ Terminal configuration> The configuration of terminal 20 according to variation 2 of the present embodiment is the same as FIG. However, in the variation 2, the functions of the beam selection unit 205 and the feedback signal generation unit 251 are changed as follows.
  • the beam selection unit 205 outputs the positioning beam information to the positioning unit 206 and outputs the transmission beam information and the positioning beam information to the feedback signal generation unit 251.
  • the feedback signal generation unit 251 performs encoding processing and modulation processing on the transmission beam information and positioning beam information output from the beam selection unit 205, and generates a feedback signal.
  • the feedback signal generation unit 251 outputs the generated feedback signal to the communication unit 202.
  • FIG. 8 is a sequence diagram showing operations of base station 10 and terminal 20 according to variation 2 of the present embodiment.
  • steps common to those in FIG. 3 are denoted by the same reference numerals as those in FIG.
  • the terminal 20 After selecting the transmission beam and the positioning beam (ST102, ST103), the terminal 20 transmits a feedback signal including the transmission beam information and the positioning beam information to the base station 10 (ST121).
  • the base station 10 transmits a PRS using the positioning beam (#m) (ST122).
  • terminal 20 performs positioning (position estimation of terminal 20) using the PRS transmitted in the positioning beam (#m) (ST123). Specifically, the positioning unit 206 estimates the direction of the terminal 20 with respect to the base station 10 based on the AOD corresponding to the positioning beam. Further, the positioning unit 206 estimates the distance from the base station 10 to the terminal 20 based on the PRS TOA, TDOA, RSSI, and the like.
  • a plurality of base stations 10 may estimate the position of the terminal 20 based on AOD, TOA, TDOA, RSSI, and the like.
  • the beam having the highest reception quality is selected as the transmission beam, and the beam having the best positioning accuracy is selected as the positioning beam.
  • the terminal 20 can perform the positioning process using the signal transmitted in the beam directed in the direction in which the terminal 20 exists. Therefore, positioning using MassiveMaMIMO technology can be performed with high accuracy.
  • the base station 10 since the terminal 20 feeds back the positioning beam information to the base station 10, the base station 10 only needs to transmit one PRS using the positioning beam, and overhead. Can be reduced.
  • a configuration example of the base station 10 according to Variation 3 of the present embodiment is the same as FIG. However, in variation 3, the functions of the PRS generation unit 102 and the feedback signal processing unit 152 are changed as described below, and the functions of the weight selection unit 105 and the transmission beamforming unit 106 are added.
  • the PRS generation unit 102 generates one PRS and outputs it to the transmission beamforming unit 106.
  • the weight selection unit 105 is a BF weight that forms the positioning beam selected by the terminal 20 based on the positioning beam information output from the feedback signal processing unit 152 after the discovery signal is transmitted and before the data transmission is started. Is output to the transmission beamforming unit 106.
  • the transmission beamforming unit 106 multiplies the PRS output from the PRS generation unit 102 by the BF weight corresponding to the positioning beam after transmitting the discovery signal and before starting data transmission, and Output.
  • the feedback signal processing unit 152 performs demodulation processing and decoding processing on the feedback signal output from the reception beam forming unit 151, and extracts transmission beam information and positioning beam information.
  • the feedback signal processing unit 152 outputs the extracted transmission beam information and positioning beam information to the weight selection unit 105.
  • Terminal 20 The configuration of terminal 20 according to variation 2 of the present embodiment is the same as FIG. However, in the variation 2, the functions of the positioning accuracy calculation unit 204 and the feedback signal generation unit 251 are added as follows.
  • the positioning accuracy calculation unit 204 calculates the positioning accuracy of the positioning beam using the PRS output from the communication unit 202.
  • the positioning accuracy calculation unit 204 outputs the calculated positioning accuracy of the positioning beam to the feedback signal generation unit 251.
  • the feedback signal generation unit 251 performs encoding processing and modulation processing on the positioning accuracy output from the positioning accuracy calculation unit 204, and generates a feedback signal.
  • the feedback signal generation unit 251 outputs the generated feedback signal to the communication unit 202.
  • FIG. 9 is a sequence diagram showing operations of base station 10 and terminal 20 according to variation 3 of the present embodiment.
  • the same steps as those in FIG. 7 are denoted by the same reference numerals as those in FIG.
  • the base station 10 After receiving the feedback signal from the terminal 20 (ST111), the base station 10 transmits a PRS using the positioning beam (#m) (ST131).
  • the terminal 20 calculates positioning information (positioning accuracy, TOA, TDOA, RSSI, etc.) using the PRS transmitted in the positioning beam (#m) (ST132), and a feedback signal including the positioning information. Is transmitted to the base station 10 (ST133).
  • the base station 10 performs positioning (position estimation) of the terminal 20 based on the terminal direction corresponding to the positioning beam (#m) selected by the terminal and the positioning information acquired using the positioning beam. (ST134).
  • the beam having the highest reception quality is selected as the transmission beam, and the beam having the best positioning accuracy is selected as the positioning beam.
  • the base station 10 performs a positioning process using a signal received by a beam directed in the direction in which the terminal 20 exists. Therefore, positioning using Massive MIMO technology can be performed with high accuracy.
  • the base station 10 since the terminal 20 feeds back the positioning beam information to the base station 10, the base station 10 only needs to transmit one PRS using the positioning beam, and overhead. Can be reduced. Furthermore, since position estimation can be performed in consideration of not only AOD but also TOA or TDOA, positioning with higher accuracy is possible.
  • PRS is used as a positioning reference signal.
  • the present invention is not limited to this, and a signal other than PRS may be used as a positioning reference signal.
  • the present invention is not limited to this, and other parameters such as RSRQ, RSSI, path loss, and SINR may be used.
  • the terminal direction may be estimated using a plurality of these parameters.
  • the first embodiment has been described above.
  • FIG. 10 is a sequence diagram showing operations of base station 10 and terminal 20 according to the present embodiment.
  • FIG. 11 is a figure which shows an example of the propagation path condition between the base station 10 and the terminal 20 which concerns on this Embodiment.
  • the base station 10 transmits a discovery signal to the terminal 20 (ST201).
  • Each discovery signal is multiplied by a BF weight candidate.
  • the discovery signal transmitted for each beam candidate (BF weight candidate) is not precoded and transmitted to all antennas 201 of all terminals 20.
  • terminal 20 uses the discovery signal to measure RSRP and positioning accuracy corresponding to each beam candidate, and selects a transmission beam and a positioning beam (ST202, ST203).
  • terminal 20 transmits a feedback signal including transmission beam information and positioning beam information to base station 10 (ST204).
  • terminal 20 transmits a UL signal to base station 10 (ST205).
  • the base station 10 performs positioning (position estimation of the terminal 20) based on the terminal direction corresponding to the positioning beam (#m) and the positioning information acquired using the UL signal (ST206).
  • the beam having the highest reception quality is selected as the transmission beam, and the beam having the best positioning accuracy is selected as the positioning beam.
  • the base station 10 performs a positioning process using a signal received by a beam directed in the direction in which the terminal 20 exists. Therefore, positioning using Massive MIMO technology can be performed with high accuracy.
  • FIG. 12 is a diagram illustrating a configuration example of the base station 10 according to variation 1 of the second embodiment.
  • components common to those in FIG. 5 are assigned the same reference numerals as those in FIG.
  • the base station 10 shown in FIG. 12 employs a configuration in which a beam selection unit 156 is added to the base station 10 shown in FIG.
  • the feedback signal processing unit 152 performs demodulation processing and decoding processing on the feedback signal output from the reception beam forming unit 151, and extracts the RSRP and positioning accuracy of each beam candidate measured at the terminal 20.
  • the feedback signal processing unit 152 outputs the extracted RSRP and positioning accuracy of each beam candidate to the beam selection unit 156.
  • the beam selection unit 156 selects a transmission beam based on the RSRP of each beam candidate. Specifically, the beam selection unit 156 selects a beam having the highest RSRP as a transmission beam. The beam selection unit 156 outputs transmission beam information indicating the index of the selected transmission beam to the weight selection unit 105.
  • the beam selection unit 156 selects a positioning beam based on the positioning accuracy of each beam candidate. Specifically, the beam selection unit 156 selects a beam having the best positioning accuracy as a positioning beam. The beam selection unit 156 outputs positioning beam information indicating the index of the selected positioning beam to the weight selection unit 105 and the positioning unit 155.
  • the weight selection unit 105 selects a BF weight that forms a transmission beam based on the transmission beam information output from the beam selection unit 156, and outputs the BF weight to the transmission beamforming unit 106 and the reception beamforming unit 151.
  • the weight selection unit 105 selects a BF weight that forms a positioning beam based on the positioning beam information output from the beam selection unit 156 and outputs the BF weight to the reception beam forming unit 151.
  • the positioning unit 155 performs positioning (position estimation) of the terminal 20 using the signal received in the positioning beam selected by the beam selection unit 156.
  • FIG. 13 is a block diagram illustrating a configuration example of the terminal 20 according to the second embodiment.
  • the terminal 20 shown in FIG. 13 employs a configuration in which the beam selection unit 205 is deleted from the terminal 20 shown in FIG.
  • the reception quality measurement unit 203 uses the discovery signal output from the communication unit 202 to measure RSRP between the base station 10 and the terminal 20 of each beam candidate. Reception quality measurement section 203 outputs the measured RSRP of each beam candidate to feedback signal generation section 251.
  • the positioning accuracy calculation unit 204 uses the discovery signal output from the communication unit 202 to calculate the positioning accuracy of each beam candidate.
  • the positioning accuracy calculation unit 204 outputs the calculated positioning accuracy of each beam candidate to the feedback signal generation unit 251.
  • the feedback signal generation unit 251 performs encoding processing and modulation processing on the RSRP and positioning accuracy of each beam candidate output from the reception quality measurement unit 203 to generate a feedback signal.
  • the feedback signal generation unit 251 outputs the generated feedback signal to the communication unit 202.
  • FIG. 14 is a sequence diagram showing operations of base station 10 and terminal 20 according to variation 1 of the present embodiment.
  • terminal 20 transmits a UL (uplink) signal to base station 10 (ST211). At this time, the terminal 20 transmits the same number of UL signals as the number of beam candidates. Note that the terminal 20 may add reference information to the UL signal when the base station 10 performs beam selection.
  • the reference information is, for example, position information acquired by the terminal 20 using other means such as GPS or BLE (Bluetooth (registered trademark) Low Energy).
  • the base station 10 selects a transmission beam based on the RSRP of the UL signal of each candidate beam (ST212), and selects a positioning beam based on the positioning accuracy of the UL signal of each candidate beam (ST212). ST213).
  • terminal 20 transmits a UL signal to base station 10 (ST214).
  • the base station 10 performs positioning (position estimation of the terminal 20) based on the terminal direction corresponding to the positioning beam (#m) and the positioning information acquired using the UL signal (ST215).
  • the position of the terminal 20 can be estimated based on the positioning information acquired by the plurality of base stations 10.
  • the beam having the highest reception quality is selected as the transmission beam, and the beam having the best positioning accuracy is selected as the positioning beam.
  • the terminal 20 can perform the positioning process using the signal transmitted in the beam directed in the direction in which the terminal 20 exists. Therefore, positioning using MassiveMaMIMO technology can be performed with high accuracy.
  • PRS is used as a positioning reference signal.
  • the present invention is not limited to this, and a signal other than PRS may be used as a positioning reference signal.
  • the present invention is not limited to this, and other parameters such as RSRQ, RSSI, path loss, and SINR may be used.
  • the terminal direction may be estimated using a plurality of these parameters.
  • the embodiment 2 has been described above.
  • Embodiment 3 In Embodiment 3, a case where the base station 10 and the terminal 20 perform BF will be described.
  • the configuration of base station 10 of Embodiment 3 is the same as that shown in FIG.
  • FIG. 15 is a block diagram illustrating a configuration example of the terminal 20 according to the third embodiment.
  • the same components as those in FIG. 2 are denoted by the same reference numerals as those in FIG.
  • the terminal 20 shown in FIG. 15 adopts a configuration in which a weight selection unit 209, a reception beamforming unit 210, and a transmission beamforming unit 254 are added to the terminal 20 shown in FIG.
  • the weight selection unit 209 selects a BF weight forming a transmission beam based on the transmission beam information output from the beam selection unit 205, and outputs the BF weight to the reception beam forming unit 210 and the transmission beam forming unit 254.
  • the weight selection unit 209 selects a BF weight forming a positioning beam based on the positioning beam information output from the beam selection unit 205, and outputs the BF weight to the reception beam forming unit 210 and the transmission beam forming unit 254.
  • the reception beamforming unit 210 multiplies the downlink signal output from each communication unit 202 by the BF weight that forms the transmission beam output from the weight selection unit 209 during data reception, and receives the reception quality measurement unit. 203, the positioning accuracy calculation unit 204, and the post coding unit 207.
  • reception beamforming unit 210 multiplies the downlink signal output from each communication unit 202 by a BF weight that forms a positioning beam output from the weight selection unit 209 during positioning, and performs positioning unit 206. Output to.
  • the transmission beamforming unit 254 transmits the transmission beam output from the weight selection unit 209 in response to the data signal output from the precoding unit 253 or the feedback signal output from the feedback signal generation unit during data transmission. Is multiplied by the BF weight forming the signal, and output to the communication unit 202.
  • the transmission beamforming unit 254 multiplies the data signal output from the precoding unit 253 by the BF weight forming the positioning beam output from the weight selection unit 209 during positioning, and the communication unit 202 Output to.
  • FIG. 16 is a sequence diagram showing operations of base station 10 and terminal 20 according to the present embodiment.
  • FIG. 17 is a diagram illustrating an example of a propagation path condition between the base station 10 and the terminal 20 according to the present embodiment.
  • the base station 10 transmits a discovery signal to the terminal 20 (ST301).
  • Each discovery signal is multiplied by a BF weight candidate.
  • the discovery signal transmitted for each beam candidate (BF weight candidate) is not precoded and transmitted to all antennas 201 of all terminals 20.
  • terminal 20 uses the discovery signal to measure RSRP and positioning accuracy corresponding to each beam candidate, and selects a transmission beam and a positioning beam (ST302, ST303).
  • the terminal 20 since the RSRP of the discovery signal transmitted from the base station 10 in the beam # 2 and received in the beam # 2 of the terminal 20 is the highest, the terminal 20 has the beam # 2 of the base station 10 and the terminal 20 Beam # 2 is selected as a transmission beam.
  • the terminal 20 since the positioning accuracy of the discovery signal transmitted from the base station 10 in the beam #m and received in the beam #n of the terminal 20 is the best, the terminal 20 uses the beam #m of the base station 10 and the beam # of the terminal 20. Select n as a positioning beam. Accordingly, the beam #m of the base station 10 directed in the direction in which the terminal 20 exists and the beam #n of the terminal 20 directed in the direction in which the base station 10 exists are used for positioning. become.
  • the base station 10 transmits a PRS to the terminal 20 (ST304).
  • Each PRS is multiplied by a BF weight candidate.
  • the PRS transmitted for each BF weight candidate is not precoded and transmitted to all antennas 201 of all terminals 20.
  • the terminal 20 performs positioning (position estimation of the terminal 20) using the PRS transmitted in the positioning beam (#m) of the base station 10 and received in the positioning beam (#n) of the terminal 20. Perform (ST305).
  • the base station 10 and the terminal 20 may be interchanged to perform the operation.
  • the beam of the base station 10 and the beam of the terminal 20 with the highest reception quality are selected as the transmission beams, and the beam of the base station 10 and the terminal 20 of the positioning accuracy with the highest positioning accuracy are selected.
  • Each of the beams is selected as a positioning beam.
  • the terminal 20 performs positioning processing using a signal transmitted from the base station 10 in a beam directed in the direction in which the terminal 20 exists. Therefore, positioning using Massive MIMO technology can be performed with high accuracy.
  • the base station 10 transmits the PRS using the positioning beam selected by the terminal 20, and the terminal 20 can perform positioning.
  • the terminal 20 can perform positioning.
  • operations of base station 10 and terminal 20 in this case will be described.
  • FIG. 18 is a sequence diagram showing operations of base station 10 and terminal 20 according to variation 1 of the present embodiment.
  • steps common to FIG. 16 are denoted by the same reference numerals as those in FIG.
  • the terminal 20 After selecting the transmission beam and the positioning beam (ST302, ST303), the terminal 20 transmits a feedback signal including the transmission beam information and the positioning beam information to the base station 10 (ST321).
  • the base station 10 transmits a PRS using the positioning beam (#m) (ST322).
  • the terminal 20 performs positioning (position estimation of the terminal 20) using the PRS transmitted in the positioning beam (#m) of the base station 10 and received in the positioning beam (#n) of the terminal 20. Perform (ST323).
  • the base station 10 can transmit the PRS using the positioning beam selected by the terminal 20, and the base station 10 can perform the positioning. .
  • the base station 10 and terminal 20 in this case will be described.
  • FIG. 19 is a sequence diagram showing operations of base station 10 and terminal 20 according to variation 2 of the present embodiment.
  • steps common to those in FIG. 18 are denoted by the same reference numerals as those in FIG.
  • the base station 10 After receiving the feedback signal from the terminal 20 (ST321), the base station 10 transmits a PRS using the positioning beam (#m) (ST331).
  • terminal 20 calculates the positioning accuracy using the PRS transmitted in the positioning beam (#m) of base station 10 and received in the positioning beam (#n) of terminal 20 (ST332). Then, a feedback signal including positioning accuracy is transmitted to the base station 10 (ST333).
  • base station 10 performs positioning (position estimation) of terminal 20 based on the positioning accuracy of positioning beam (#m) of base station 10 and positioning beam (#n) of terminal 20 (ST334). .
  • PRS is used as a positioning reference signal.
  • the present invention is not limited to this, and a signal other than PRS may be used as a positioning reference signal.
  • the present invention is not limited to this, and other parameters such as RSRQ, RSSI, path loss, and SINR may be used.
  • the terminal direction may be estimated using a plurality of these parameters.
  • the base station 10 transmits a discovery signal using a relatively wide beam candidate in the low frequency band, and the base station 10 or the terminal 20 selects the first positioning beam. .
  • a high frequency band beam having a center direction within a range of ⁇ X ° from the center direction of the first positioning beam is selected as a beam candidate. Then, the final positioning beam is selected from the selected beam candidates in the high frequency band.
  • the low-frequency band beam candidate having the highest PRPS in the first stage is selected as the first positioning beam
  • the high-frequency band candidate having the best measurement accuracy is selected in the second stage. It may be selected as a positioning beam.
  • the low-frequency band candidate with the best positioning accuracy is selected as the first positioning beam
  • the high-frequency band candidate with the highest PRPS is selected as the final positioning beam. May be.
  • each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
  • a wireless base station, a user terminal, etc. in an embodiment of the present invention may function as a computer that performs processing of the wireless communication method of the present invention.
  • FIG. 20 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
  • the base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or a plurality of devices illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the base station 10 and the terminal 20 is obtained by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs computation and communication by the communication device 1004 or memory This is realized by controlling data reading and / or writing in the storage 1003 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the processor 1001 reads a program (program code), software module, or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • the control unit 101 of the base station 10 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks.
  • the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium and includes at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to the embodiment of the present invention.
  • the storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the above-described storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server, or other suitable medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • a network device a network controller, a network card, a communication module, or the like.
  • the communication units 107 and 202 and the antennas 108 and 201 described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
  • the base station 10 and the terminal 20 include hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), and field programmable gate array (FPGA). And a part or all of each functional block may be realized by the hardware.
  • the processor 1001 may be implemented by at least one of these hardware.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 5G
  • FRA Full Radio Access
  • W-CDMA Wideband
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB User Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 UWB (Ultra-WideBand
  • the present invention may be applied to a Bluetooth (registered trademark), a system using another appropriate system, and / or a next generation system extended based on the system.
  • the specific operation assumed to be performed by the base station (radio base station) in this specification may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (e.g., It is obvious that this can be performed by MME (Mobility Management Entity) or S-GW (Serving Gateway).
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Information, signals, and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).
  • software, instructions, etc. may be transmitted / received via a transmission medium.
  • software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • DSL digital subscriber line
  • wireless technology such as infrared, wireless and microwave.
  • Information, signal Information, signals, etc. described herein may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
  • the channel and / or symbol may be a signal.
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, or the like.
  • radio resource may be indicated by an index.
  • a base station can accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Radio Head) can also provide communication services.
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein.
  • a base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.
  • a user terminal is a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile by a person skilled in the art It may also be referred to as a terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, UE (User Equipment), or some other appropriate terminology.
  • determining may encompass a wide variety of actions. “Judgment” and “determination” are, for example, judgment, calculation, calculation, processing, derivation, investigating, looking up (eg, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like.
  • determination and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as “determined” or "determined”.
  • determination and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
  • connection means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof.
  • the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples
  • electromagnetic energy such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot depending on an applied standard.
  • the correction RS may be referred to as TRS (Tracking ⁇ RS), PC-RS (Phase Compensation RS), PTRS (Phase Tracking RS), or Additional RS.
  • the demodulation RS and the correction RS may be called differently corresponding to each. Further, the demodulation RS and the correction RS may be defined by the same name (for example, the demodulation RS).
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • the radio frame may be composed of one or a plurality of frames in the time domain.
  • One or more frames in the time domain may be referred to as subframes, time units, etc.
  • a subframe may further be composed of one or more slots in the time domain.
  • the slot may be further configured with one or a plurality of symbols (OFDM (Orthogonal-Frequency-Division-Multiplexing) symbol, SC-FDMA (Single-Carrier-Frequency-Division-Multiple-Access) symbol, etc.) in the time domain.
  • OFDM Orthogonal-Frequency-Division-Multiplexing
  • SC-FDMA Single-Carrier-Frequency-Division-Multiple-Access
  • the radio frame, subframe, slot, and symbol all represent a time unit when transmitting a signal. Radio frames, subframes, slots, and symbols may be called differently corresponding to each.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each mobile station) to each mobile station.
  • the minimum time unit of scheduling may be called TTI (Transmission Time Interval).
  • one subframe may be referred to as TTI
  • a plurality of consecutive subframes may be referred to as TTI
  • one slot may be referred to as TTI.
  • the resource unit is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • one or a plurality of symbols may be included, and one slot, one subframe, or a length of 1 TTI may be included.
  • One TTI and one subframe may each be composed of one or a plurality of resource units.
  • the resource unit may also be called a resource block (RB: Resource Block), a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, a scheduling unit, a frequency unit, or a subband.
  • the resource unit may be composed of one or a plurality of REs.
  • 1 RE may be any resource (for example, the smallest resource unit) smaller than a resource unit serving as a resource allocation unit, and is not limited to the name RE.
  • the structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, the number of symbols and resource blocks included in the slots, and the subframes included in the resource block
  • the number of carriers can be variously changed.
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • One embodiment of the present invention is useful for a mobile communication system.

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Abstract

La présente invention vise à effectuer, avec un degré élevé de précision, un positionnement à l'aide d'une technologie MIMO massive, même si un obstacle est présent entre une station de base et un terminal. L'invention concerne un terminal d'utilisateur (20), dans lequel une unité de mesure de qualité de réception (203) utilise un signal de découverte délivré en sortie à partir d'une unité de communication (202) afin de mesurer le RSRP (un paramètre lié à la qualité de réception) pour chaque candidat de faisceau. L'unité de calcul de précision de mesure (204) calcule un paramètre lié à la précision de positionnement pour chaque candidat de faisceau, à l'aide d'un signal de découverte délivré en sortie à partir d'une unité de communication (202). Une unité de sélection de faisceau (205) sélectionne un faisceau de transmission sur la base du RSRP, et sélectionne un faisceau de positionnement sur la base de la précision de positionnement.
PCT/JP2018/009129 2017-03-17 2018-03-09 Terminal utilisateur et procédé de positionnement WO2018168670A1 (fr)

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JP2017-053162 2017-03-17

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Cited By (7)

* Cited by examiner, † Cited by third party
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WO2020068310A1 (fr) * 2018-09-27 2020-04-02 Sony Corporation Obtention d'informations de position à la demande dans un système de communication sans fil
WO2020066103A1 (fr) * 2018-09-27 2020-04-02 三菱電機株式会社 Station de base, dispositif terminal, procédé de positionnement et système de communication sans fil
WO2020069164A1 (fr) * 2018-09-28 2020-04-02 Intel Corporation Systèmes et procédés pour déterminer une période et une précision de mesurage pour un rapport de faisceau basé sur une rsrp de couche 1 (l1)
CN113167852A (zh) * 2019-01-24 2021-07-23 瑞典爱立信有限公司 网络节点及在其中执行的用于处理通信网络中的物体的数据的方法
CN113765547A (zh) * 2020-06-03 2021-12-07 华为技术有限公司 一种波束对齐方法及相关设备
JP2022506416A (ja) * 2018-11-06 2022-01-17 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 参照シンボル送信のためのスペクトル領域の識別
CN114942405A (zh) * 2022-05-16 2022-08-26 中国电信股份有限公司 一种定位方法、系统、装置、设备及存储介质

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007013500A (ja) * 2005-06-29 2007-01-18 Canon Inc 無線端末位置推定システム、無線端末位置推定システムの位置推定方法及びデータ処理装置
JP2015185952A (ja) * 2014-03-20 2015-10-22 株式会社Ｎｔｔドコモ 移動通信システム、基地局、およびユーザ装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007013500A (ja) * 2005-06-29 2007-01-18 Canon Inc 無線端末位置推定システム、無線端末位置推定システムの位置推定方法及びデータ処理装置
JP2015185952A (ja) * 2014-03-20 2015-10-22 株式会社Ｎｔｔドコモ 移動通信システム、基地局、およびユーザ装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON ET AL.: "Multipath RSTD reporting per cell for enhanced indoor positioning", 3GPP TSG-RAN WGL#86B R1-1610383, 10 October 2016 (2016-10-10), XP051150393, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_86b/Docs/R1-1610383.zip> *
NOKIA NETWORKS: "Potential enhancements for OTDOA", 3GPP TSG-RAN WG1#82 R1-154738, 24 August 2015 (2015-08-24), XP051001952, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_82/Docs/R1-154738.zip> *

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPWO2020066103A1 (ja) * 2018-09-27 2021-09-02 三菱電機株式会社 基地局、端末装置、測位方法、および無線通信システム
US11736904B2 (en) 2018-09-27 2023-08-22 Sony Group Corporation On demand positioning in a wireless communication system
JP7323543B2 (ja) 2018-09-27 2023-08-08 三菱電機株式会社 基地局、端末装置、測位方法、および無線通信システム
US20220026517A1 (en) * 2018-09-27 2022-01-27 Mitsubishi Electric Corporation Base station, terminal device, positioning method, and wireless communication system
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US11576008B2 (en) 2018-09-27 2023-02-07 Sony Group Corporation On demand positioning in a wireless communication system
US11956048B2 (en) 2018-09-28 2024-04-09 Apple Inc. Systems and methods for measurement period and accuracy for beam reporting based on L1-RSRP
WO2020069164A1 (fr) * 2018-09-28 2020-04-02 Intel Corporation Systèmes et procédés pour déterminer une période et une précision de mesurage pour un rapport de faisceau basé sur une rsrp de couche 1 (l1)
JP7269334B2 (ja) 2018-11-06 2023-05-08 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 参照シンボル送信のためのスペクトル領域の識別
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US12120718B2 (en) 2018-11-06 2024-10-15 Telefonaktiebolaget Lm Ericsson (Publ) Spectral region identification for reference symbol
EP3914923A4 (fr) * 2019-01-24 2022-09-07 Telefonaktiebolaget Lm Ericsson (Publ) Noeud de réseau et procédé mis en oeuvre dans ce dernier afin de gérer des données d'objets dans un réseau de communication
US11789120B2 (en) 2019-01-24 2023-10-17 Telefonaktiebolaget Lm Ericsson (Publ) Network node and method performed therein for handling data of objects in a communication network
CN113167852A (zh) * 2019-01-24 2021-07-23 瑞典爱立信有限公司 网络节点及在其中执行的用于处理通信网络中的物体的数据的方法
CN113765547B (zh) * 2020-06-03 2023-04-07 华为技术有限公司 一种波束对齐方法及相关设备
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